CVE-2024-21785: Automationdirect p1-540 Firmware

Critical severity, CVSS 9.8. EPSS: 1.5% chance of exploitation in the next 30 days.

A leftover debug code vulnerability exists in the Telnet Diagnostic Interface functionality of AutomationDirect P3-550E 1.2.10.9. A specially crafted series of network requests can lead to unauthorized access. An attacker can send a sequence of requests to trigger this vulnerability.

Affected products

• Automationdirect p1-540 Firmware: version 1.2.10.10 only; version 4.1.1.10 only
• Automationdirect p1-550 Firmware: version 1.2.10.10 only; version 4.1.1.10 only
• Automationdirect p2-550 Firmware: version 1.2.10.10 only; version 4.1.1.10 only
• Automationdirect p3-530 Firmware: version 1.2.10.9 only; version 4.1.1.10 only
• Automationdirect p3-550 Firmware: version 1.2.10.9 only; version 4.1.1.10 only
• Automationdirect p3-550e Firmware: version 1.2.10.9 only; version 4.1.1.10 only

Published 2024-05-28. Last modified 2026-06-17.